Smoke-preventing boiler-furnace.



E. c, Hock. SMOKE PREVENTING BOILIER FURNACE.

APPLICATION FILED FEB. 20| 1917.

3 SHEETS-SHEET II.

3 SHEETS-SHEET 2a Patented Mar. I9, 1918.

E. C. HOCK.

SMOKE PREVENTING BOlLER FURNACE.

l APPLICATION FILED 8.20. 1911.

I gri/manica ggf mf m QE E. 0. Hoen. SMOKE PREVENTING BOILER FURNACE. APPLICATION FILE) FEB-20.1911.

Law, y Patented mr. 19, 19118.

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TINTTE STATES PATENT FFTQE.

EDWARD c. HOOK, 0F BUFFALO, NEW YORK.V

SMOKE-PREVENTING BOILER-FURNACE.

Application led February 20, 1917.

To all 'whom t may concern:

Be it known that I, EDWARD CHARLES Hoon, a citizen of the United States of America, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful lmp'rovements in Smoke-Preventing Boiler-Furnaces, of which the following is a specification.

This invention relates to furnaces for steam or hot water heating systems and power boilers.

The object of the invention is to provide a furnace for boilers which will combine the properties of smokeless combustion, extensive direct heating surface and facility of regulating the smokeless combust-ion current with relation tosaid extensive heating surface.

1n the accompanying drawings,

Figure 1 represents a longitudinal vertical section of a boiler furnace embodying the preferred form of this invention, said section being taken on line l-1 of Fig. 8, parts being broken out.

Fig. 2 represents a horizontal section thereof on line 2-2 of Fig. 1, parts being broken out.

Fig. 3 represents a vertical transverse section thereof on line 3-3 of Fig. 1.

Fig. 4 represents a vertical transverse section thereof on line 4 4 of Fig. 1.

The same reference numbers indicate corresponding parts in thc different figures.

The furnace structure includes the general features of a well known type of boiler furnace, being divided into a boiler chamber 10 in which the boiler 20 is set, a primary combustion chamber 30 beneath lthe front portion of the boiler chamber, an ash chamber 40 below the primary combustion chamber, a secondary combustion chamber 50 beneath the rear portion of the boiler chamber, a back chamber vat the rear of the boiler 20, a front chamber atthefront thereof, and a smoke stack `80 leading up fromrthe chamber 7 0. and provided with a damper 81.

A central bridge wall 90 disposed below the boiler about midway of the length thereof, separates the secondary combustion chamber 50 from the fire chamber 30 and ash chamber 40. This bridge wall has an arcshaped top 91, which is preferably concentric with the boiler at some distancetherefrom, and extends upward adjacent toopposite sides thereof. The bridgel thus forms Specification of Letters Patent.

Patented Mar. 19, 1918.

Serial No. 149,859.

an arc-shaped passage 41 between its tcp and the lower portion of the boiler, which passage establishes communication between the primary or combustion chamber 30 and the secondary chamber 50.

A rear bridge wall 100 disposed below the rear end of the boiler separates the back chamber or flue 60 from the secondary combustion chamber 40. This rear bridge wall has an arc-shaped top 101, which is preferably concentric with the boiler at some distance therefrom and extends upward on opposite sides thereof adjacent thereto. This bridge wall forms an arc-shaped passage 61 between its top and the lower portion of the boiler and this passage establishes communication between the secondary combustion chamber 50 and the back chamber 60.

The boiler 2O is of the lire tube type and its fire tubes 21 establish communication between the back chamber 60 and the front chamber 70 from which the stack 80 leads upward. The diameter of the boiler is less than the width of the boiler chamber 10 so that spaces 11 and 12 are left between the furnace walls and the boiler on opposite sides of thelatter. These spaces constitute up ward extensions of the combustion chambers 30 and 50 and terminate at the top of the boiler chamber, the top of the boiler being at the top of the chamber. These upper extension combustion chambers in connection with the lower combustion chambers provide a direct heating surface throughout the exterior of the boiler and operate' to supen heat the steam. The usual water supply pipe 22 passes through the rear wall, through the rear bridge wall 100 and enters the boiler at any suitable point.

An inlet air duct 110 is disposed at the base of the furnace and extends longitudinally along the center thereof from the back wall through the back chamber 60, rear bridge wall 100, secondary combustion chamber 50 and centra-l bridge wall 90, being open at its outer end for the admission of air to support smokeless combustion. The ash pit 40 is provided across the front of said bridge wall 90 with a transverse air channel 41 connected with the inner end of said air duct 110. The ash Chamber walls are provided with longitudinal side channels 42 and 43, which are closed at their outer ends and connected at their inner ends with said transverse channel 41 at opposite ends thereof. The bridge wall 90 is provided with a plurality of vertical channels 92 (three being shown inthe drawings), which are open at their lower ends inte thetransverse channel 41 and provided at their upper ends with delivery orifices 93, which open into the fire or combustion chamber 30 at or near the level of the fuel therein under ordinary conditions of feeding. The left side wall of the fire chamber 30 is provided with vertical channels 31 (three being shown) which open at their lower ends into the side channel 42 and are provided at their upper ends with delivery orifices 32, which likewise open inte the primary combustion chamber above the bed of fuel and deliver heated air thereinto. The right side wall of the fire chamber 30 is provided with similar vertical channels 33, which open at their lower ends into the side channel 43 and are provided at their upper ends with delivery orifices 34 which likewise open into the primary combustion cham er and deliver air thereinto. The transverse channel 41 and side channels 42 and 43 are built into the ash chamber 40 and provided with beveled tops 48 which flare upward to the outer edges of the grate 49. The vertical channels in the side walls of the lire chamber are separated by thin walls from said chamber, so that the air passingthrough said channels will be well heated.

A defiector 65 is pivoted to the rearbridge Y wall 70 at the lower edge of the arc-shaped passage61 and is adapted to close the lower part of said passage. This deflector is adapted to be swung backward to open said passage more or less for regulating the current of gases passing from the combustion chambers upward around the steam spaceof the boiler as hereinafter explained. This Y' deflector is supported on a transverse rod f bustion.

66 which extends from side to side of the back chamber 60. The rod 66 is provided with Va hand wheelr67.

In the use of this furnace air admitted through the main duct 110 passes forward therethrough within the furnace structure into the transverse channel 41, thence into the side channels 42 and 43, thence Aupward through the vertical channels 92, 31 and 33 and through the delivery orifices 93, 32 and 34 into the primary combustion cham ber; thus distributing a supply of heated air to facilitate and produce smokeless com- The combustion current passes along the bottom of the boiler in direct contact therewith through the passage 51 into Vthe secondary combustion chamber, through said chamber along the bottom of the boiler and through the passage 61, past the de- Vflector into back chamber 60, andrin part upward around the boiler at each side there-V of in direct contact with the boiler and thence rearward through the boiler chamber 10 into the back chamber 60; thence forward through the fire tubes of the boiler into the front chamber 70 and thence upward through the stack 80.

By manipulation of the damper 65, more or less of the combustion current is made to pass Yunderneath the boiler through the passages 51 and 61 and a greater Vor less proportion upward through the extension combustion chambers 11 and 12. The combustion current can thus be divided, regulated and varied in direction Vto suit the conditions of combustion incident to the volumeand condition of the air admitted to the combustion chamber. Y

l/Yhen it is desired to? reduce the steaming power of the boiler, the deflector 65 is opened and when the boiler is to be run to its full capacity of steaming power, the deflector 65 is closed. When the deiiector 65 is open and the stack damper is closed or partially closed the fire is checked and yet sufficient air is admitted to the combustion chamber to prevent the formation of smoke and when said l In the use vof this furnace a Vlarge directV contact surface is obtained which is subjected to the heat of the intensified smokeless combustion induced in the combustion chambers and extension combustion chambers as hereinbefore stated'. By the adjustment of the deflector 65' and further by the relative adjustments of the deflector 65'and damper 81, in connection with the vertical flues in the side walls of the combustion chamber which deliver the heated air over the bedof fuel and in connection with the extension combustion Vchambers extending upward around the boiler to the top thereof, a thorough combustion may be obtained without waste of heat through the stack, and the size of the stack may be reduced.

I claimas my invention:

1. A boiler furnace comprising a horizontal cylindrical boiler, back and front flue `necting said chambers, an underneathcombustion chamber below said boiler, extension `combustion chambers continuous with said combustion chamber and extending rupward around said boiler on opposite `sides to the top thereofiandopening into said back flue chamber,a bridge wall disposed between said underneath vcombustion chamber and said back flue chamber and provided with an areshaped top which forms the lower part of the boiler an are-shaped passage connecting said underneath Combustion Chamber' with said back flue chamber, a defleetor disposed at said aro-shaped passage, and means for adjusting said defleetor to vary the combustion current with respect to said oombustien chamber and extension Combustion chambers.

2. A boiler furnace comprising a horizontal cylindrical boiler, back and front iue chambers at opposite ends thereof, flues connecting said Chambers, an underneath Combustion chamber below said boiler, a central bridge wall dividing said underneath conibustion chamber into primary and secondary combustion chambers and provided with air channels having orices opening into said primary combustion chamber and with an aro-shaped top which forms with the lower part of the boiler an arc-shaped passage connecting said primary and secondary Combustion Chambers, extension Combustion chambers continuous with said underneath combustion Chamber and extending upward around said boiler on opposite sides thereof and opening into said back flue chamber, a bridge wall disposed between said underneath Combustion chamber and said back flue chamber and provided with an are-shaped top which forms with the lower part of the boiler an are-shaped passage Connecting said underneath combustion chamber with said back fine chamber', a deflector disposed at said are-shaped passage, and means for adjusting said delieetor to vary the Combustion current with respect to said Combustion chamber and extension combustion chambers.

A boiler furnace comprising a horizontal cylindrical boiler, baelrand front flue Chambers at opposite ends thereof, lues connecting said chambers, a stack Connected with said front iue chamber, an underneath combustion Chamber below said boiler, eX- tension Combustion chambers Continuous with said combustion chamber and extending upward around said boiler on opposite sides to the top thereof and opening into said back fine chamber, a bridge wall disposed between said underneath Combustion chainber and said baol; iue chamber and Jforming with the lower part of the boiler an areshaped passage connecting said underneath eonibustion chamber with said back flue chamber, a deiieetor disposed at said areshaped passage, a damper in said stack, and means for adjusting said delector and damper to vary the Combustion current with respect to said Combustion hamber and eX- tension combustion chambers.

EDWARD C. HOOK. l/Vitnesses ELwARD C. RISCHMAN, Louise MALL.

Gopies of this patent may be ebtaned for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

